Diagnosis value comparison of 256-slice CT and 64-slice CT in pulmonary embolism / 中国基层医药

ABSTRACT

Objective To compare the value of 64-slice CT and 256-slice spiral CT in the diagnosis of pul-monary embolism.Methods A retrospective analysis CT pulmonary angiography of pulmonary embolism clinical cases,65 cases were in our hospital ,256-slice CT and 64-slice CT angiography were performed within 3 days of onset . The two kinds of inspection equipment for pulmonary embolism detection rate were analyzed and compared , and its image SNR, in contrast to noise ratio ,average scan time and the average dose of contrast agent used for comparison . Results The two devices display rate of pulmonary embolism was 100.0%,in the noise,image SNR,contrast to noise ratio,scan length,the 256-slice CT and 64-slice CT was no significant difference (P>0.05).The average 256-slice CT contrast agent was (4.45 ±1.37) mSv,64-slice CT was (5.68 ±1.06) mSv,there was significant difference between the two (t=2.77,P<0.05),an average of 256-slice CT scan time was (3.68 ±1.29)s,64-slice CT was (7.61 ± 1.40),there was significant difference between the two (t=11.33,P<0.001).Conclusion 256-slice CT and 64-slice CT can be used as an effective means of clinical diagnosis of pulmonary embolism ,but compared with 64-slice CT,the 256-slice CT can significantly reduce the scan time ,reduce the amount of radioactive contrast agent ,which has certain advantages .